C++字符输入输出示例-优快云博客

本文提供了一个简单的C++程序示例，演示了如何使用标准输入输出进行字符的读取与显示。通过该示例，读者可以了解基本的字符输入输出操作。

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#include <iostream>
using namespace std;

int main()
{
   char c;
   cout<<"please :";
   cin>>c;
   cout<< c <<endl;

   if( true)
   {
       cout<<"please :";
       cin>>c;
       cout<<c<<endl;
   }
   return 0;
}

输出结果:
please: abcd
a
please: b

template<class _Elem,
    class _Traits> inline
    basic_istream<_Elem, _Traits>& __cdecl operator>>(
        basic_istream<_Elem, _Traits>& _Istr, _Elem& _Ch)
    {    // extract a character
    typedef basic_istream<_Elem, _Traits> _Myis;
    typename _Myis::int_type _Meta;
    ios_base::iostate _State = ios_base::goodbit;
    const typename _Myis::sentry _Ok(_Istr);

    if (_Ok)
        {    // state okay, extract characters
        _TRY_IO_BEGIN
        _Meta = _Istr.rdbuf()->sbumpc();
        if (_Traits::eq_int_type(_Traits::eof(), _Meta))
            _State |= ios_base::eofbit | ios_base::failbit;    // end of file
        else
            _Ch = _Traits::to_char_type(_Meta);    // got a character
        _CATCH_IO_(_Istr)
        }

    _Istr.setstate(_State);
    return (_Istr);
    }